summaryrefslogtreecommitdiffstats
path: root/arch/alpha/boot/bootpz.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/alpha/boot/bootpz.c')
-rw-r--r--arch/alpha/boot/bootpz.c475
1 files changed, 0 insertions, 475 deletions
diff --git a/arch/alpha/boot/bootpz.c b/arch/alpha/boot/bootpz.c
deleted file mode 100644
index d6ad191..0000000
--- a/arch/alpha/boot/bootpz.c
+++ /dev/null
@@ -1,475 +0,0 @@
-/*
- * arch/alpha/boot/bootpz.c
- *
- * Copyright (C) 1997 Jay Estabrook
- *
- * This file is used for creating a compressed BOOTP file for the
- * Linux/AXP kernel
- *
- * based significantly on the arch/alpha/boot/main.c of Linus Torvalds
- * and the decompression code from MILO.
- */
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <generated/utsrelease.h>
-#include <linux/mm.h>
-
-#include <asm/console.h>
-#include <asm/hwrpb.h>
-#include <asm/pgtable.h>
-#include <asm/io.h>
-
-#include <stdarg.h>
-
-#include "kzsize.h"
-
-/* FIXME FIXME FIXME */
-#define MALLOC_AREA_SIZE 0x200000 /* 2MB for now */
-/* FIXME FIXME FIXME */
-
-
-/*
- WARNING NOTE
-
- It is very possible that turning on additional messages may cause
- kernel image corruption due to stack usage to do the printing.
-
-*/
-
-#undef DEBUG_CHECK_RANGE
-#undef DEBUG_ADDRESSES
-#undef DEBUG_LAST_STEPS
-
-extern unsigned long switch_to_osf_pal(unsigned long nr,
- struct pcb_struct * pcb_va, struct pcb_struct * pcb_pa,
- unsigned long *vptb);
-
-extern int decompress_kernel(void* destination, void *source,
- size_t ksize, size_t kzsize);
-
-extern void move_stack(unsigned long new_stack);
-
-struct hwrpb_struct *hwrpb = INIT_HWRPB;
-static struct pcb_struct pcb_va[1];
-
-/*
- * Find a physical address of a virtual object..
- *
- * This is easy using the virtual page table address.
- */
-#define VPTB ((unsigned long *) 0x200000000)
-
-static inline unsigned long
-find_pa(unsigned long address)
-{
- unsigned long result;
-
- result = VPTB[address >> 13];
- result >>= 32;
- result <<= 13;
- result |= address & 0x1fff;
- return result;
-}
-
-int
-check_range(unsigned long vstart, unsigned long vend,
- unsigned long kstart, unsigned long kend)
-{
- unsigned long vaddr, kaddr;
-
-#ifdef DEBUG_CHECK_RANGE
- srm_printk("check_range: V[0x%lx:0x%lx] K[0x%lx:0x%lx]\n",
- vstart, vend, kstart, kend);
-#endif
- /* do some range checking for detecting an overlap... */
- for (vaddr = vstart; vaddr <= vend; vaddr += PAGE_SIZE)
- {
- kaddr = (find_pa(vaddr) | PAGE_OFFSET);
- if (kaddr >= kstart && kaddr <= kend)
- {
-#ifdef DEBUG_CHECK_RANGE
- srm_printk("OVERLAP: vaddr 0x%lx kaddr 0x%lx"
- " [0x%lx:0x%lx]\n",
- vaddr, kaddr, kstart, kend);
-#endif
- return 1;
- }
- }
- return 0;
-}
-
-/*
- * This function moves into OSF/1 pal-code, and has a temporary
- * PCB for that. The kernel proper should replace this PCB with
- * the real one as soon as possible.
- *
- * The page table muckery in here depends on the fact that the boot
- * code has the L1 page table identity-map itself in the second PTE
- * in the L1 page table. Thus the L1-page is virtually addressable
- * itself (through three levels) at virtual address 0x200802000.
- */
-
-#define L1 ((unsigned long *) 0x200802000)
-
-void
-pal_init(void)
-{
- unsigned long i, rev;
- struct percpu_struct * percpu;
- struct pcb_struct * pcb_pa;
-
- /* Create the dummy PCB. */
- pcb_va->ksp = 0;
- pcb_va->usp = 0;
- pcb_va->ptbr = L1[1] >> 32;
- pcb_va->asn = 0;
- pcb_va->pcc = 0;
- pcb_va->unique = 0;
- pcb_va->flags = 1;
- pcb_va->res1 = 0;
- pcb_va->res2 = 0;
- pcb_pa = (struct pcb_struct *)find_pa((unsigned long)pcb_va);
-
- /*
- * a0 = 2 (OSF)
- * a1 = return address, but we give the asm the vaddr of the PCB
- * a2 = physical addr of PCB
- * a3 = new virtual page table pointer
- * a4 = KSP (but the asm sets it)
- */
- srm_printk("Switching to OSF PAL-code... ");
-
- i = switch_to_osf_pal(2, pcb_va, pcb_pa, VPTB);
- if (i) {
- srm_printk("failed, code %ld\n", i);
- __halt();
- }
-
- percpu = (struct percpu_struct *)
- (INIT_HWRPB->processor_offset + (unsigned long) INIT_HWRPB);
- rev = percpu->pal_revision = percpu->palcode_avail[2];
-
- srm_printk("OK (rev %lx)\n", rev);
-
- tbia(); /* do it directly in case we are SMP */
-}
-
-/*
- * Start the kernel.
- */
-static inline void
-runkernel(void)
-{
- __asm__ __volatile__(
- "bis %0,%0,$27\n\t"
- "jmp ($27)"
- : /* no outputs: it doesn't even return */
- : "r" (START_ADDR));
-}
-
-/* Must record the SP (it is virtual) on entry, so we can make sure
- not to overwrite it during movement or decompression. */
-unsigned long SP_on_entry;
-
-/* Calculate the kernel image address based on the end of the BOOTP
- bootstrapper (ie this program).
-*/
-extern char _end;
-#define KERNEL_ORIGIN \
- ((((unsigned long)&_end) + 511) & ~511)
-
-/* Round address to next higher page boundary. */
-#define NEXT_PAGE(a) (((a) | (PAGE_SIZE - 1)) + 1)
-
-#ifdef INITRD_IMAGE_SIZE
-# define REAL_INITRD_SIZE INITRD_IMAGE_SIZE
-#else
-# define REAL_INITRD_SIZE 0
-#endif
-
-/* Defines from include/asm-alpha/system.h
-
- BOOT_ADDR Virtual address at which the consoles loads
- the BOOTP image.
-
- KERNEL_START KSEG address at which the kernel is built to run,
- which includes some initial data pages before the
- code.
-
- START_ADDR KSEG address of the entry point of kernel code.
-
- ZERO_PGE KSEG address of page full of zeroes, but
- upon entry to kerne cvan be expected
- to hold the parameter list and possible
- INTRD information.
-
- These are used in the local defines below.
-*/
-
-
-/* Virtual addresses for the BOOTP image. Note that this includes the
- bootstrapper code as well as the compressed kernel image, and
- possibly the INITRD image.
-
- Oh, and do NOT forget the STACK, which appears to be placed virtually
- beyond the end of the loaded image.
-*/
-#define V_BOOT_IMAGE_START BOOT_ADDR
-#define V_BOOT_IMAGE_END SP_on_entry
-
-/* Virtual addresses for just the bootstrapper part of the BOOTP image. */
-#define V_BOOTSTRAPPER_START BOOT_ADDR
-#define V_BOOTSTRAPPER_END KERNEL_ORIGIN
-
-/* Virtual addresses for just the data part of the BOOTP
- image. This may also include the INITRD image, but always
- includes the STACK.
-*/
-#define V_DATA_START KERNEL_ORIGIN
-#define V_INITRD_START (KERNEL_ORIGIN + KERNEL_Z_SIZE)
-#define V_INTRD_END (V_INITRD_START + REAL_INITRD_SIZE)
-#define V_DATA_END V_BOOT_IMAGE_END
-
-/* KSEG addresses for the uncompressed kernel.
-
- Note that the end address includes workspace for the decompression.
- Note also that the DATA_START address is ZERO_PGE, to which we write
- just before jumping to the kernel image at START_ADDR.
- */
-#define K_KERNEL_DATA_START ZERO_PGE
-#define K_KERNEL_IMAGE_START START_ADDR
-#define K_KERNEL_IMAGE_END (START_ADDR + KERNEL_SIZE)
-
-/* Define to where we may have to decompress the kernel image, before
- we move it to the final position, in case of overlap. This will be
- above the final position of the kernel.
-
- Regardless of overlap, we move the INITRD image to the end of this
- copy area, because there needs to be a buffer area after the kernel
- for "bootmem" anyway.
-*/
-#define K_COPY_IMAGE_START NEXT_PAGE(K_KERNEL_IMAGE_END)
-/* Reserve one page below INITRD for the new stack. */
-#define K_INITRD_START \
- NEXT_PAGE(K_COPY_IMAGE_START + KERNEL_SIZE + PAGE_SIZE)
-#define K_COPY_IMAGE_END \
- (K_INITRD_START + REAL_INITRD_SIZE + MALLOC_AREA_SIZE)
-#define K_COPY_IMAGE_SIZE \
- NEXT_PAGE(K_COPY_IMAGE_END - K_COPY_IMAGE_START)
-
-void
-start_kernel(void)
-{
- int must_move = 0;
-
- /* Initialize these for the decompression-in-place situation,
- which is the smallest amount of work and most likely to
- occur when using the normal START_ADDR of the kernel
- (currently set to 16MB, to clear all console code.
- */
- unsigned long uncompressed_image_start = K_KERNEL_IMAGE_START;
- unsigned long uncompressed_image_end = K_KERNEL_IMAGE_END;
-
- unsigned long initrd_image_start = K_INITRD_START;
-
- /*
- * Note that this crufty stuff with static and envval
- * and envbuf is because:
- *
- * 1. Frequently, the stack is short, and we don't want to overrun;
- * 2. Frequently the stack is where we are going to copy the kernel to;
- * 3. A certain SRM console required the GET_ENV output to stack.
- * ??? A comment in the aboot sources indicates that the GET_ENV
- * destination must be quadword aligned. Might this explain the
- * behaviour, rather than requiring output to the stack, which
- * seems rather far-fetched.
- */
- static long nbytes;
- static char envval[256] __attribute__((aligned(8)));
- register unsigned long asm_sp asm("30");
-
- SP_on_entry = asm_sp;
-
- srm_printk("Linux/Alpha BOOTPZ Loader for Linux " UTS_RELEASE "\n");
-
- /* Validity check the HWRPB. */
- if (INIT_HWRPB->pagesize != 8192) {
- srm_printk("Expected 8kB pages, got %ldkB\n",
- INIT_HWRPB->pagesize >> 10);
- return;
- }
- if (INIT_HWRPB->vptb != (unsigned long) VPTB) {
- srm_printk("Expected vptb at %p, got %p\n",
- VPTB, (void *)INIT_HWRPB->vptb);
- return;
- }
-
- /* PALcode (re)initialization. */
- pal_init();
-
- /* Get the parameter list from the console environment variable. */
- nbytes = callback_getenv(ENV_BOOTED_OSFLAGS, envval, sizeof(envval));
- if (nbytes < 0 || nbytes >= sizeof(envval)) {
- nbytes = 0;
- }
- envval[nbytes] = '\0';
-
-#ifdef DEBUG_ADDRESSES
- srm_printk("START_ADDR 0x%lx\n", START_ADDR);
- srm_printk("KERNEL_ORIGIN 0x%lx\n", KERNEL_ORIGIN);
- srm_printk("KERNEL_SIZE 0x%x\n", KERNEL_SIZE);
- srm_printk("KERNEL_Z_SIZE 0x%x\n", KERNEL_Z_SIZE);
-#endif
-
- /* Since all the SRM consoles load the BOOTP image at virtual
- * 0x20000000, we have to ensure that the physical memory
- * pages occupied by that image do NOT overlap the physical
- * address range where the kernel wants to be run. This
- * causes real problems when attempting to cdecompress the
- * former into the latter... :-(
- *
- * So, we may have to decompress/move the kernel/INITRD image
- * virtual-to-physical someplace else first before moving
- * kernel /INITRD to their final resting places... ;-}
- *
- * Sigh...
- */
-
- /* First, check to see if the range of addresses occupied by
- the bootstrapper part of the BOOTP image include any of the
- physical pages into which the kernel will be placed for
- execution.
-
- We only need check on the final kernel image range, since we
- will put the INITRD someplace that we can be sure is not
- in conflict.
- */
- if (check_range(V_BOOTSTRAPPER_START, V_BOOTSTRAPPER_END,
- K_KERNEL_DATA_START, K_KERNEL_IMAGE_END))
- {
- srm_printk("FATAL ERROR: overlap of bootstrapper code\n");
- __halt();
- }
-
- /* Next, check to see if the range of addresses occupied by
- the compressed kernel/INITRD/stack portion of the BOOTP
- image include any of the physical pages into which the
- decompressed kernel or the INITRD will be placed for
- execution.
- */
- if (check_range(V_DATA_START, V_DATA_END,
- K_KERNEL_IMAGE_START, K_COPY_IMAGE_END))
- {
-#ifdef DEBUG_ADDRESSES
- srm_printk("OVERLAP: cannot decompress in place\n");
-#endif
- uncompressed_image_start = K_COPY_IMAGE_START;
- uncompressed_image_end = K_COPY_IMAGE_END;
- must_move = 1;
-
- /* Finally, check to see if the range of addresses
- occupied by the compressed kernel/INITRD part of
- the BOOTP image include any of the physical pages
- into which that part is to be copied for
- decompression.
- */
- while (check_range(V_DATA_START, V_DATA_END,
- uncompressed_image_start,
- uncompressed_image_end))
- {
-#if 0
- uncompressed_image_start += K_COPY_IMAGE_SIZE;
- uncompressed_image_end += K_COPY_IMAGE_SIZE;
- initrd_image_start += K_COPY_IMAGE_SIZE;
-#else
- /* Keep as close as possible to end of BOOTP image. */
- uncompressed_image_start += PAGE_SIZE;
- uncompressed_image_end += PAGE_SIZE;
- initrd_image_start += PAGE_SIZE;
-#endif
- }
- }
-
- srm_printk("Starting to load the kernel with args '%s'\n", envval);
-
-#ifdef DEBUG_ADDRESSES
- srm_printk("Decompressing the kernel...\n"
- "...from 0x%lx to 0x%lx size 0x%x\n",
- V_DATA_START,
- uncompressed_image_start,
- KERNEL_SIZE);
-#endif
- decompress_kernel((void *)uncompressed_image_start,
- (void *)V_DATA_START,
- KERNEL_SIZE, KERNEL_Z_SIZE);
-
- /*
- * Now, move things to their final positions, if/as required.
- */
-
-#ifdef INITRD_IMAGE_SIZE
-
- /* First, we always move the INITRD image, if present. */
-#ifdef DEBUG_ADDRESSES
- srm_printk("Moving the INITRD image...\n"
- " from 0x%lx to 0x%lx size 0x%x\n",
- V_INITRD_START,
- initrd_image_start,
- INITRD_IMAGE_SIZE);
-#endif
- memcpy((void *)initrd_image_start, (void *)V_INITRD_START,
- INITRD_IMAGE_SIZE);
-
-#endif /* INITRD_IMAGE_SIZE */
-
- /* Next, we may have to move the uncompressed kernel to the
- final destination.
- */
- if (must_move) {
-#ifdef DEBUG_ADDRESSES
- srm_printk("Moving the uncompressed kernel...\n"
- "...from 0x%lx to 0x%lx size 0x%x\n",
- uncompressed_image_start,
- K_KERNEL_IMAGE_START,
- (unsigned)KERNEL_SIZE);
-#endif
- /*
- * Move the stack to a safe place to ensure it won't be
- * overwritten by kernel image.
- */
- move_stack(initrd_image_start - PAGE_SIZE);
-
- memcpy((void *)K_KERNEL_IMAGE_START,
- (void *)uncompressed_image_start, KERNEL_SIZE);
- }
-
- /* Clear the zero page, then move the argument list in. */
-#ifdef DEBUG_LAST_STEPS
- srm_printk("Preparing ZERO_PGE...\n");
-#endif
- memset((char*)ZERO_PGE, 0, PAGE_SIZE);
- strcpy((char*)ZERO_PGE, envval);
-
-#ifdef INITRD_IMAGE_SIZE
-
-#ifdef DEBUG_LAST_STEPS
- srm_printk("Preparing INITRD info...\n");
-#endif
- /* Finally, set the INITRD paramenters for the kernel. */
- ((long *)(ZERO_PGE+256))[0] = initrd_image_start;
- ((long *)(ZERO_PGE+256))[1] = INITRD_IMAGE_SIZE;
-
-#endif /* INITRD_IMAGE_SIZE */
-
-#ifdef DEBUG_LAST_STEPS
- srm_printk("Doing 'runkernel()'...\n");
-#endif
- runkernel();
-}
-
- /* dummy function, should never be called. */
-void *__kmalloc(size_t size, gfp_t flags)
-{
- return (void *)NULL;
-}